METHOD AND DEVICE FOR MEASURING A BATTERY CELL CURRENT
First Claim
1. A method for measuring a battery cell current (IB) of a battery cell unit (20), the method comprising:
- discharging an inductively stored energy from the battery cell unit (2) by means of a discharging unit (10) after the battery cell unit (2) has been switched off, wherein the inductively stored energy from the battery cell unit (20) is an energy stored by means of an inductive behavior of the battery cell unit (20),determining a time period (tM) in which the inductively stored energy from the battery cell (20) unit drops to a predefined threshold value, anddetermining a battery cell current (IB) on the basis of the time period (tM) determined.
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Abstract
The invention relates to a method and to a device for measuring a battery cell current through a battery cell unit. After the battery cell unit has been switched off, inductively stored energy from the battery cell unit is discharged (S1) by means of a discharging unit, wherein the inductively stored energy from the battery cell unit is energy stored by means of an inductive behavior of the battery cell unit, a time period in which the inductively stored energy from the battery cell unit has fallen to a predefined threshold value is determined (S2), and a battery cell current is determined (S3) on the basis of the time period determined.
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Citations
10 Claims
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1. A method for measuring a battery cell current (IB) of a battery cell unit (20), the method comprising:
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discharging an inductively stored energy from the battery cell unit (2) by means of a discharging unit (10) after the battery cell unit (2) has been switched off, wherein the inductively stored energy from the battery cell unit (20) is an energy stored by means of an inductive behavior of the battery cell unit (20), determining a time period (tM) in which the inductively stored energy from the battery cell (20) unit drops to a predefined threshold value, and determining a battery cell current (IB) on the basis of the time period (tM) determined. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for measuring a battery cell current (IB) of a battery cell unit (20), the device comprising:
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a discharging unit (10), which discharges an inductively stored energy from the battery cell unit (20) after said battery cell unit (20) has been switched off, wherein the inductively stored energy from said battery cell unit (20) is an energy stored by means of an inductive behavior of said battery cell unit (20), a measuring unit (30), which determines a time period (tM) in which the inductively stored energy from the battery cell unit (20) has fallen to a predefined threshold value (S), and an evaluation unit (40), which determines a battery cell current (IB) on the basis of the time period (tM) determined.
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9. A battery cell control unit (50) comprising:
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a battery cell unit (20), a discharging unit (10), which discharges an inductively stored energy from the battery cell unit (20) after said battery cell unit (20) has been switched off, wherein the inductively stored energy from said battery cell unit (20) is an energy stored by means of an inductive behavior of said battery cell unit (20), a measuring unit (30), which determines a time period (tM) in which the inductively stored energy from the battery cell unit (20) has fallen to a predefined threshold value (S), and an evaluation unit (40), which determines a battery cell current (IB) on the basis of the time period (tM) determined. - View Dependent Claims (10)
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Specification